On Cinco de Mayo, Jon & I make my signature frozen margaritas. The recipe is as follows:

1 can Minute Maid Limeade dumped in blender
Using the empty limeade can, fill 3/4 of the way with tequila of choice, then the remaining with triple sec or Grand Marnier. Dump into blender, then blend contents for 20 seconds.
Let settle, then pour half back in to fill limeade can (that's your second batch).
Add a splash of orange juice, lime juice, and agave nectar or simple syrup to what remains in the blender, then blend.
Garnish with a lime wheel or wedge.